Type-writing machine.



No. 699,325. Patented May 6,1902. 9. HDRSTMANN & w. WENDT.

TYPE WRITING MACHINE.

(Application filed Feb. 27, 1901. (No Model.) 2 Sheets'-Sheet L mmm. w A w w THE rmmwxs PETERS 00., Pnmaurund msmncwn, a. c.

- No. 699,325. Patented May 6, I902.

R. HORSTMANN -& WENDT.

TYPE WRITING MACHINE.

(Application filed Feb. 27, 1901.)

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U trien STATES PATENT @FELCE- RICHARD HORSTMANN AND \VILIIELlII \(VENDT, OF BERLIN, GERMANY.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 699,325, dated May 6, 1902. Application filed February 27, 1901. Serial No. 49,095. (No model.)

To [0Z5 whom it may concern:

Be it known that we, RICHARD HORSTMANN, merchant, of 8 Ansbacherstrasse, and WIL- HELM WENDT, of 181 Reichenbergerstrasse, Berlin, in the Empire of Germany, haveinvented certain new and useful Improvements Relating to Type-WritingMachines, of, which the following is a specification.

This invention relates to improvements in certain parts of type-writing machines provided with a type-sector and key-levers, the principal objects aimed at in the construction being lightness of touch, simplicity, and certainty of operation.

A preferred form of the invention is illustrated in the accompanying drawings, in which Figure l is a longitudinal section through the machine; and Fig. 2 is a section on the line A B of Fig. 1, the paper guiding and supporting mechanism being omitted for the sake of greater clearness.

The key-levers A are pivoted upon the axis B and are provided at their extremities with a downwardly-extending prolongation O, by means of which they bearupon the under edge of a frame E, which is also pivoted on the axis B. Each of the keys rests loose upon a suitably-guided plunger F,'which is pressed upward by means of a spring G, whereby the keys are maintained in their highest position, from which they are prevented from passing by a fixed stop H.

WVhen a key is depressed, the corresponding arm 0 strikes against the frame E and carries it backward against a bolt K, mounted An arm M is rigidly connected with the hammer L, and this arm M is engaged upon the bolt K and serves as a bearing for a spiral spring N, which is also passed upon this bolt, the other extremity of the spring bearing upon a stop 0 on the bolt K. From the platen-hammer L is pivotally suspended a latch P, the nose of which en gages beneath a projection Q of the frame I.

When upon the depression of a key the bolt K is pressed backward by the intermediary of the frame E, the spring N will be compressed; but owing to the locking effected by the latch I the platen-hammer L will still be unable to move. Only when the bolt K has been pressed backward to such an extent that it releases the'latch P will the spring which has been compressed in the first stage of the movement effect an abrupt displacement of the hammer L around the axis D, so that the head of the hammer causes the paper and the inked ribbon to strike against the type-sector R, and thus makes an impression from the corresponding type upon the paper. As soon as the key is released the spring N extends and the platen-hammer falls back into the position shown in Fig. 1, owing to its own weight, the latch P again engaging beneath the projection Q. The type-sector is set in such a position that the type corresponding with the key depressed comes opposite the head of the platen-hammer in the following manner: The arm 0 of the key in question strikes against one or other of the yokes S T, according as the key struck is upon the left or right hand side of the keyboard. These'yokes S and T are pivotally mounted upon the axis U, upon which is mounted a lever V or WV for each side of the machine, each of these levers engaging in a disk Y, rotatably mounted upon the axis X of the type-sec tor, one upon either side of this latter. 'When therefore a key is depressed, either the yoke S and with it the lever'V or the yoke T and with it the lever NV is displaced and causes the disk Y to rotate in one direction or the other, this rotation being communicated to the type-sector R by means of an arm Z. In order that during this displacement the typesector may be retained in such a position that the type corresponding to the key which has been depressed may exactly register with the head of the platen-hammer, the plungers F are formed with a notch 1, through which an arm 2, rotating with the type-sector axis X, is able to pass. When, however, a key is depressed, this notch descends to such an extent that the arm 2 is notable to'pass, but is retained. The type-sector is at this moment in such a position that the type corresponding to the key'which has been depressed is ready to make an impression. The arm 2 We have called a selecting-arm.

It is obvious that if type-sectors of the usual kind are employed, in which several rows of type arearranged one above the other, in the first place the height of the type-sec tor must be adjusted, if necessary. This displacement and also the feeding of the paper are effected in any known and convenient manner, and for this reason the respective de- Vices are omitted from the drawings, so as to insure greater clearness.

What we claim is- 1. In a type-writer, a pivoted platen-hammer, a depending abutment fixed to said hammer so as to turn with it, a retaining-latch pivoted to and suspended on saidhammenaplunger passing through said abutment and impinging upon said latch, a shoulder on said plunger and a spring between said shoulder and said abutment,substantially as described.

2. In a type-writer, a pivoted type-sector,

a selecting-arm fixed thereto so as to rotate therewith, de'pressible key-levers, selectingplungers for stopping said selecting-arm under the respective key-levers-and a spring under each plunger normally supporting both its plunger and the key-lever over it.

In witnesswhereof We have hereunto signed our names, this 11th day of February, 1901, in the presence of two subscribing witnesses.

RICHARD HORSTMANN. VVILHELM XVENDT.

Witnesses:

HENRY HASPER, VOLDEMAR ITAUPT. 

